Modifiers matching wildfowl:

• resident,
• plus,
• dead,
• breeding,
• ornamental,
• migratory,
• aquatic,
• herbivorous,

Simple categories matching herbivorous:

• animal,
• vertebrate,
• mammal,
• tortoise,
• species,
• lizard,
• bird,
• invertebrate,
• fish,
• beast,
• zooplankton,
• fauna,
• crustacean,
• pest,
• seafood,
• creature,
• rodent,
• wildfowl,
• arthropod,
• insect,
• gastropod,
• ruminant,
• reptile,
• organism,
• waterbird,
• pet,
• host,
• dinosaur,
• snail,
• tetrapod,
• shellfish,
• predator,
• marsupial,
• mollusk,
• prey,